Buttonhole-sewing machine



BUTTONHOLE' SEWING MACHINE.

y AFFLICATlON FILED FEB. 2| 192|. 1,437,847. Patented Dec. 5, v 2SHEETBfBHE l lnvenToT: John Kiewcz?D n 6 7 3 I 5, w. o.. 2 2 ...w l 5 A..u A 3 3 .d w LM. 2 P

Patented Dee. 5, 19.22

wir i, FMCQW' JOHN KIEWICZ, OF BOSTON, MASSACHUSETTS; ASSIGNOR TO THEREECE BUTTONI-IOLE MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, ACORPORATION F MAINE.

IBUTTONHOLE-SEWING MACHINE.

Application led February 12, 1921. Serial No. 444,310.

To alt/whom t may concer/11,:

Be it known that l, JOHN Kinwicz, a citizen oi' thenited States, and'resident of Boston7 county of Suffolk, State of Massachusetts, haveinvented an improvement 1n Buttonhole-Sewing Machines, of which the'following description, in connection with the accompanying drawing', isa specification,

. like characters on the drawing representing like parts. v

This invention relates to bnttonhole sewing machines of that type inwhich the needle Y turn is situated axially of the rotary block or gearby which the needle bar is given its rotative movement, and said sleeveand block are so constructed that the sleeve not only can reciprocatethrough the block but can have a lateral movement relative thereto. Theportion of the sleeve which extends be-y low the block is provided withinclined grooves and the gear member is formed with projections whichare received in said grooves, the construction being such that thereciprocation oic the sleeve through the gear member will cause thesleeve to be shifted laterally. y

ln order to give an understanding of my invention I have illustrated inthe drawings a selected embodiment thereof, which will now' bedescribed, after which the novel teatures will be pointed out in theappended claims.

Fig. 1 is a side view of a portion of a sew- Fig. 2 is a front viewotthehead.

Fig. 3 is a central sectional viewthrough the needle bar.

Figli is a section on-the line @-4, Fig. 2.

In the drawings, 1 indicates the bed of a buttonhole sewing machine and2 the head or overhanging arm in which the needle bar 3 reciprocates.The needle bar is given its reciprocation by means of a lever 4 pivotedto the frame at 5 and connected at one end tothe needle bar by ,suitablemeans and having the other end connected to an eccentric strap 6embracing an eccentric lTcarried by the shaft 8. This shaft 8 isldrivenfronithe driving shaft 9 by mea-ns oi suitable gears 10 and 11, saidgears being so arranged that the shaft 8 will make two rotations foreach'L rotation of the driving shaft 9.

The parts thus far described are all as usual in `4sewing machines andform no part of my present invention. y yThe needle Abar extends axiallythrough and reciprocates in.

a sleeve 12, and this sleeve 12 in turner;-` tends axially through agear member 13, which is journaled in the head 2 and which meshes with agear sector 14 carried by a shaft 15. This shaft `15 is turned bysuitable mechanism when the stitching is being done around the end ofthe buttonhole, all as usual in buttonhole sewing machines of this type,-thereby to rotate the gear 13 and turn the needle bar 3 upon its axis.

The opening 15 through the gear 13 which is occupied by the sleeve 12islarger than the sleeve so as to permit the latter kto have a lateralmovement and means are provided whereby vertical reciprocating movement'of the sleeve 12 relative tothe gear 13 will cause the sleeve to vibratelaterally, thus giving the 4desired lateral vibrating movement to theneedle bar. The portion 1G of the sleeve which extends below thegear 13is rectangular in .cross section, as shown in Fig. a, and it has aninclined groove'17 formed on each of two opposite faces. The

.. held in positionby Lshaped retainers 21 carried by the ea1s18 andhaving portions 22 `which overlie the ends of the y blocks. Theseretainers areheld in adjusted position by said screws 23. n

With this arrangement it will be observed that a vertical movement ofthe sleeve 12 relative to the gear 13 will cause the sleeve to loo tion,but if the sleeve is raised into the'dot# ted line position, the actionof the projections 2O in the grooves 17 will cause the'sleeve -to` beshifted laterally into the dotted line position, thus giving a lateralshifting "movement to the needle bar.

Means are provided vforgiving-the sleeve 12 one reciprocation foreachtwo reciproca`4 tions of the needle bar. Journalled inthe head2 is ashaft 24rhaving an arm 25 which is flexibly connected to the sleeve,said arm being` provided with a forked portion r26 which embraces thesleeve and each arm of the fork being slottedrto receive a pin 27extending froin'a collar 28 that is swivelledon the sleeve. The shaft 244is also provided with an arm 29 which islconn'ected by a'link 30 to aforked lever 31 pivoted to the yframe at 32, the fork of the 'leverembracing va cam 33 fast on the shaft 9.

The rotation of the shaft 9 will therefore result in giving verticalreciprocation to the sleeve 12, but since the sleeve 12 is reciprocatedfrom the shaft 9 while'the needle bar is recijiirocated from the shaft8, the needle bar will reciprocate twice as fast as the sleeve.Consequently the needle bar will have a complete reciprocationeach timethe -sleeve is moved downwardly and another complete reciprocationeach-time :the sleeve is moved upwardly and as aresult the alternatethrusts of the needle will be in the full line position, F ig. 2, whilethe other thrusts ywill be in the dotted line position, Fig. 2.

The connection between-the sleeve andthe gear is such that the rotationof the ygear will `be communicated 'to the sleeve, and to communicatethis rotation to the needle'bar the latter is provided with a lgroove 34in which is received a key 35 carried bythe sleeve. This constructionpermits the needle bar 'to reciprocate freely inthe sleeve but insuresthat the needle bar and sleeve will always rota-te in unison. The upperend of the needle bar reciprocates through a ball member 36 which isreceived `in a suitable socket 37 l'formed in the head2, this ball yandsocketconstruction permitting the shogging movement ofthe needlein allpositions around the'butt'onhole. l

The construction herein shown is -relatively simple and provides for thenecessary shogging movement of the needle, not only while the stitchesare being formed/along the side of the buttonhole but also when vthestitches are being formed around the eye of the buttonhole.

'inclined grooves, vprojections carried by the other of said parts andoperating in said grooves, whereby the reciprocating movementfof thesleevethrough the gear member will move said sleeve laterally yrelativeto the gear member.

2. 1n a buttonhole sewing machine, ythe combination with a frame, of agear member rotatably mounted therein, a sleeve extending axiallyz`through the gear member butcapable of a lateral movement relativethereto, a needle bar reciprocatingthrough the sleeve, means ttoreciprocate Ltheneedle bar, means to reciprocate kthe sleeve iin thegear member, ears depending fromthe gear member `and projections carriedby said ears, said sleeve having inclined `grooves in which saidprojections operate, wherebylthe reciprocatimg` movement of the sleevewill move the latter laterally relative tothe gear member. f

3. 'ln va buttonhole sewing machine, the combination with a frame,fof agear memberA rotatably mounted therein, a sleeve eX- tending axiallythrough the gear member but capable of a lateral movement relativethereto, a needle bar reciprocating through the sleeve, means toreciprocate the needle bar, means to reciprocate the 'sleeve in the gearmember, ears depending from thegear member `and projections adjustablycarried by said ears, said sleeve having inclined grooves in which saidprojections operate, whereby the reciprocating movement ofthe sleevewill move the latter laterally relative to the gear member.`

4. In a buttonhole sewing machine, the combination with a frame, of areciprocating needle bar therein, a sleeve through which the needle barextends, a rotatable gear member through which'the sleeve eX- tends andby which the needlebar is rotated in stitching around the end of abuttonhole, saidsleeve being capable of a lateral movement relative tothe gear member, means to reciprocate the needle bar, Vmeans toreciprocate the sleeve through the rgear member, said sleevehaving-inclined grooves 4and projections 4adjustably carried by the gearmember and operating in said grooves, whereby the reciprocating movementof the sleeve will move the latter laterally relative to the gearmember.

5. ln a buttonhole sewing machine` the combination With a frame, of agear member rotatably mounted therein, a sleeve eX- tending axiallythrough the gear member but capable of a lateral movement relativethereto, a needle bar reciprocating through the sleeve, means toreciprocate the needle bar, means to reciprocate the sleeve in the gearmember, said sleeve having inclined grooves, and projections carried bythe gear member and o erating in said grooves, 10 whereby thereciprocating movement of the sleeve Will move the latter laterallyrelative to the gear member.

In testimony whereof, l have signed. my

name to this specification.

JOHN KIEWICZ.

